sound/soc/codecs/wm8731.c

   1 /*
   2  * wm8731.c  --  WM8731 ALSA SoC Audio driver
   3  *
   4  * Copyright 2005 Openedhand Ltd.
   5  *
   6  * Author: Richard Purdie <richard@openedhand.com>
   7  *
   8  * Based on wm8753.c by Liam Girdwood
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/moduleparam.h>
  17 #include <linux/init.h>
  18 #include <linux/delay.h>
  19 #include <linux/pm.h>
  20 #include <linux/i2c.h>
  21 #include <linux/platform_device.h>
  22 #include <sound/core.h>
  23 #include <sound/pcm.h>
  24 #include <sound/pcm_params.h>
  25 #include <sound/soc.h>
  26 #include <sound/soc-dapm.h>
  27 #include <sound/initval.h>
  28
  29 #include "wm8731.h"
  30
  31 #define AUDIO_NAME "wm8731"
  32 #define WM8731_VERSION "0.13"
  33
  34 /*
  35  * Debug
  36  */
  37
  38 #define WM8731_DEBUG 0
  39
  40 #ifdef WM8731_DEBUG
  41 #define dbg(format, arg...) \
  42         printk(KERN_DEBUG AUDIO_NAME ": " format "\n" , ## arg)
  43 #else
  44 #define dbg(format, arg...) do {} while (0)
  45 #endif
  46 #define err(format, arg...) \
  47         printk(KERN_ERR AUDIO_NAME ": " format "\n" , ## arg)
  48 #define info(format, arg...) \
  49         printk(KERN_INFO AUDIO_NAME ": " format "\n" , ## arg)
  50 #define warn(format, arg...) \
  51         printk(KERN_WARNING AUDIO_NAME ": " format "\n" , ## arg)
  52
  53 struct snd_soc_codec_device soc_codec_dev_wm8731;
  54
  55 /* codec private data */
  56 struct wm8731_priv {
  57         unsigned int sysclk;
  58 };
  59
  60 /*
  61  * wm8731 register cache
  62  * We can't read the WM8731 register space when we are
  63  * using 2 wire for device control, so we cache them instead.
  64  * There is no point in caching the reset register
  65  */
  66 static const u16 wm8731_reg[WM8731_CACHEREGNUM] = {
  67     0x0097, 0x0097, 0x0079, 0x0079,
  68     0x000a, 0x0008, 0x009f, 0x000a,
  69     0x0000, 0x0000
  70 };
  71
  72 /*
  73  * read wm8731 register cache
  74  */
  75 static inline unsigned int wm8731_read_reg_cache(struct snd_soc_codec *codec,
  76         unsigned int reg)
  77 {
  78         u16 *cache = codec->reg_cache;
  79         if (reg == WM8731_RESET)
  80                 return 0;
  81         if (reg >= WM8731_CACHEREGNUM)
  82                 return -1;
  83         return cache[reg];
  84 }
  85
  86 /*
  87  * write wm8731 register cache
  88  */
  89 static inline void wm8731_write_reg_cache(struct snd_soc_codec *codec,
  90         u16 reg, unsigned int value)
  91 {
  92         u16 *cache = codec->reg_cache;
  93         if (reg >= WM8731_CACHEREGNUM)
  94                 return;
  95         cache[reg] = value;
  96 }
  97
  98 /*
  99  * write to the WM8731 register space
 100  */
 101 static int wm8731_write(struct snd_soc_codec *codec, unsigned int reg,
 102         unsigned int value)
 103 {
 104         u8 data[2];
 105
 106         /* data is
 107          *   D15..D9 WM8731 register offset
 108          *   D8...D0 register data
 109          */
 110         data[0] = (reg << 1) | ((value >> 8) & 0x0001);
 111         data[1] = value & 0x00ff;
 112
 113         wm8731_write_reg_cache(codec, reg, value);
 114         if (codec->hw_write(codec->control_data, data, 2) == 2)
 115                 return 0;
 116         else
 117                 return -EIO;
 118 }
 119
 120 #define wm8731_reset(c) wm8731_write(c, WM8731_RESET, 0)
 121
 122 static const char *wm8731_input_select[] = {"Line In", "Mic"};
 123 static const char *wm8731_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
 124
 125 static const struct soc_enum wm8731_enum[] = {
 126         SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select),
 127         SOC_ENUM_SINGLE(WM8731_APDIGI, 1, 4, wm8731_deemph),
 128 };
 129
 130 static const struct snd_kcontrol_new wm8731_snd_controls[] = {
 131
 132 SOC_DOUBLE_R("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V,
 133         0, 127, 0),
 134 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V,
 135         7, 1, 0),
 136
 137 SOC_DOUBLE_R("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0),
 138 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
 139
 140 SOC_SINGLE("Mic Boost (+20dB)", WM8731_APANA, 0, 1, 0),
 141 SOC_SINGLE("Capture Mic Switch", WM8731_APANA, 1, 1, 1),
 142
 143 SOC_SINGLE("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1),
 144
 145 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
 146 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
 147
 148 SOC_ENUM("Playback De-emphasis", wm8731_enum[1]),
 149 };
 150
 151 /* add non dapm controls */
 152 static int wm8731_add_controls(struct snd_soc_codec *codec)
 153 {
 154         int err, i;
 155
 156         for (i = 0; i < ARRAY_SIZE(wm8731_snd_controls); i++) {
 157                 err = snd_ctl_add(codec->card,
 158                                   snd_soc_cnew(&wm8731_snd_controls[i],
 159                                                 codec, NULL));
 160                 if (err < 0)
 161                         return err;
 162         }
 163
 164         return 0;
 165 }
 166
 167 /* Output Mixer */
 168 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
 169 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
 170 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
 171 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
 172 };
 173
 174 /* Input mux */
 175 static const struct snd_kcontrol_new wm8731_input_mux_controls =
 176 SOC_DAPM_ENUM("Input Select", wm8731_enum[0]);
 177
 178 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 179 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
 180         &wm8731_output_mixer_controls[0],
 181         ARRAY_SIZE(wm8731_output_mixer_controls)),
 182 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
 183 SND_SOC_DAPM_OUTPUT("LOUT"),
 184 SND_SOC_DAPM_OUTPUT("LHPOUT"),
 185 SND_SOC_DAPM_OUTPUT("ROUT"),
 186 SND_SOC_DAPM_OUTPUT("RHPOUT"),
 187 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
 188 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
 189 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
 190 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
 191 SND_SOC_DAPM_INPUT("MICIN"),
 192 SND_SOC_DAPM_INPUT("RLINEIN"),
 193 SND_SOC_DAPM_INPUT("LLINEIN"),
 194 };
 195
 196 static const char *intercon[][3] = {
 197         /* output mixer */
 198         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 199         {"Output Mixer", "HiFi Playback Switch", "DAC"},
 200         {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
 201
 202         /* outputs */
 203         {"RHPOUT", NULL, "Output Mixer"},
 204         {"ROUT", NULL, "Output Mixer"},
 205         {"LHPOUT", NULL, "Output Mixer"},
 206         {"LOUT", NULL, "Output Mixer"},
 207
 208         /* input mux */
 209         {"Input Mux", "Line In", "Line Input"},
 210         {"Input Mux", "Mic", "Mic Bias"},
 211         {"ADC", NULL, "Input Mux"},
 212
 213         /* inputs */
 214         {"Line Input", NULL, "LLINEIN"},
 215         {"Line Input", NULL, "RLINEIN"},
 216         {"Mic Bias", NULL, "MICIN"},
 217
 218         /* terminator */
 219         {NULL, NULL, NULL},
 220 };
 221
 222 static int wm8731_add_widgets(struct snd_soc_codec *codec)
 223 {
 224         int i;
 225
 226         for (i = 0; i < ARRAY_SIZE(wm8731_dapm_widgets); i++)
 227                 snd_soc_dapm_new_control(codec, &wm8731_dapm_widgets[i]);
 228
 229         /* set up audio path interconnects */
 230         for (i = 0; intercon[i][0] != NULL; i++)
 231                 snd_soc_dapm_connect_input(codec, intercon[i][0],
 232                         intercon[i][1], intercon[i][2]);
 233
 234         snd_soc_dapm_new_widgets(codec);
 235         return 0;
 236 }
 237
 238 struct _coeff_div {
 239         u32 mclk;
 240         u32 rate;
 241         u16 fs;
 242         u8 sr:4;
 243         u8 bosr:1;
 244         u8 usb:1;
 245 };
 246
 247 /* codec mclk clock divider coefficients */
 248 static const struct _coeff_div coeff_div[] = {
 249         /* 48k */
 250         {12288000, 48000, 256, 0x0, 0x0, 0x0},
 251         {18432000, 48000, 384, 0x0, 0x1, 0x0},
 252         {12000000, 48000, 250, 0x0, 0x0, 0x1},
 253
 254         /* 32k */
 255         {12288000, 32000, 384, 0x6, 0x0, 0x0},
 256         {18432000, 32000, 576, 0x6, 0x1, 0x0},
 257         {12000000, 32000, 375, 0x6, 0x0, 0x1},
 258
 259         /* 8k */
 260         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
 261         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
 262         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
 263         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
 264         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
 265
 266         /* 96k */
 267         {12288000, 96000, 128, 0x7, 0x0, 0x0},
 268         {18432000, 96000, 192, 0x7, 0x1, 0x0},
 269         {12000000, 96000, 125, 0x7, 0x0, 0x1},
 270
 271         /* 44.1k */
 272         {11289600, 44100, 256, 0x8, 0x0, 0x0},
 273         {16934400, 44100, 384, 0x8, 0x1, 0x0},
 274         {12000000, 44100, 272, 0x8, 0x1, 0x1},
 275
 276         /* 88.2k */
 277         {11289600, 88200, 128, 0xf, 0x0, 0x0},
 278         {16934400, 88200, 192, 0xf, 0x1, 0x0},
 279         {12000000, 88200, 136, 0xf, 0x1, 0x1},
 280 };
 281
 282 static inline int get_coeff(int mclk, int rate)
 283 {
 284         int i;
 285
 286         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 287                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 288                         return i;
 289         }
 290         return 0;
 291 }
 292
 293 static int wm8731_hw_params(struct snd_pcm_substream *substream,
 294         struct snd_pcm_hw_params *params)
 295 {
 296         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 297         struct snd_soc_device *socdev = rtd->socdev;
 298         struct snd_soc_codec *codec = socdev->codec;
 299         struct wm8731_priv *wm8731 = codec->private_data;
 300         u16 iface = wm8731_read_reg_cache(codec, WM8731_IFACE) & 0xfff3;
 301         int i = get_coeff(wm8731->sysclk, params_rate(params));
 302         u16 srate = (coeff_div[i].sr << 2) |
 303                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
 304
 305         wm8731_write(codec, WM8731_SRATE, srate);
 306
 307         /* bit size */
 308         switch (params_format(params)) {
 309         case SNDRV_PCM_FORMAT_S16_LE:
 310                 break;
 311         case SNDRV_PCM_FORMAT_S20_3LE:
 312                 iface |= 0x0004;
 313                 break;
 314         case SNDRV_PCM_FORMAT_S24_LE:
 315                 iface |= 0x0008;
 316                 break;
 317         }
 318
 319         wm8731_write(codec, WM8731_IFACE, iface);
 320         return 0;
 321 }
 322
 323 static int wm8731_pcm_prepare(struct snd_pcm_substream *substream)
 324 {
 325         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 326         struct snd_soc_device *socdev = rtd->socdev;
 327         struct snd_soc_codec *codec = socdev->codec;
 328
 329         /* set active */
 330         wm8731_write(codec, WM8731_ACTIVE, 0x0001);
 331
 332         return 0;
 333 }
 334
 335 static void wm8731_shutdown(struct snd_pcm_substream *substream)
 336 {
 337         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 338         struct snd_soc_device *socdev = rtd->socdev;
 339         struct snd_soc_codec *codec = socdev->codec;
 340
 341         /* deactivate */
 342         if (!codec->active) {
 343                 udelay(50);
 344                 wm8731_write(codec, WM8731_ACTIVE, 0x0);
 345         }
 346 }
 347
 348 static int wm8731_mute(struct snd_soc_codec_dai *dai, int mute)
 349 {
 350         struct snd_soc_codec *codec = dai->codec;
 351         u16 mute_reg = wm8731_read_reg_cache(codec, WM8731_APDIGI) & 0xfff7;
 352
 353         if (mute)
 354                 wm8731_write(codec, WM8731_APDIGI, mute_reg | 0x8);
 355         else
 356                 wm8731_write(codec, WM8731_APDIGI, mute_reg);
 357         return 0;
 358 }
 359
 360 static int wm8731_set_dai_sysclk(struct snd_soc_codec_dai *codec_dai,
 361                 int clk_id, unsigned int freq, int dir)
 362 {
 363         struct snd_soc_codec *codec = codec_dai->codec;
 364         struct wm8731_priv *wm8731 = codec->private_data;
 365
 366         switch (freq) {
 367         case 11289600:
 368         case 12000000:
 369         case 12288000:
 370         case 16934400:
 371         case 18432000:
 372                 wm8731->sysclk = freq;
 373                 return 0;
 374         }
 375         return -EINVAL;
 376 }
 377
 378
 379 static int wm8731_set_dai_fmt(struct snd_soc_codec_dai *codec_dai,
 380                 unsigned int fmt)
 381 {
 382         struct snd_soc_codec *codec = codec_dai->codec;
 383         u16 iface = 0;
 384
 385         /* set master/slave audio interface */
 386         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 387         case SND_SOC_DAIFMT_CBM_CFM:
 388                 iface |= 0x0040;
 389                 break;
 390         case SND_SOC_DAIFMT_CBS_CFS:
 391                 break;
 392         default:
 393                 return -EINVAL;
 394         }
 395
 396         /* interface format */
 397         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 398         case SND_SOC_DAIFMT_I2S:
 399                 iface |= 0x0002;
 400                 break;
 401         case SND_SOC_DAIFMT_RIGHT_J:
 402                 break;
 403         case SND_SOC_DAIFMT_LEFT_J:
 404                 iface |= 0x0001;
 405                 break;
 406         case SND_SOC_DAIFMT_DSP_A:
 407                 iface |= 0x0003;
 408                 break;
 409         case SND_SOC_DAIFMT_DSP_B:
 410                 iface |= 0x0013;
 411                 break;
 412         default:
 413                 return -EINVAL;
 414         }
 415
 416         /* clock inversion */
 417         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 418         case SND_SOC_DAIFMT_NB_NF:
 419                 break;
 420         case SND_SOC_DAIFMT_IB_IF:
 421                 iface |= 0x0090;
 422                 break;
 423         case SND_SOC_DAIFMT_IB_NF:
 424                 iface |= 0x0080;
 425                 break;
 426         case SND_SOC_DAIFMT_NB_IF:
 427                 iface |= 0x0010;
 428                 break;
 429         default:
 430                 return -EINVAL;
 431         }
 432
 433         /* set iface */
 434         wm8731_write(codec, WM8731_IFACE, iface);
 435         return 0;
 436 }
 437
 438 static int wm8731_dapm_event(struct snd_soc_codec *codec, int event)
 439 {
 440         u16 reg = wm8731_read_reg_cache(codec, WM8731_PWR) & 0xff7f;
 441
 442         switch (event) {
 443         case SNDRV_CTL_POWER_D0: /* full On */
 444                 /* vref/mid, osc on, dac unmute */
 445                 wm8731_write(codec, WM8731_PWR, reg);
 446                 break;
 447         case SNDRV_CTL_POWER_D1: /* partial On */
 448         case SNDRV_CTL_POWER_D2: /* partial On */
 449                 break;
 450         case SNDRV_CTL_POWER_D3hot: /* Off, with power */
 451                 /* everything off except vref/vmid, */
 452                 wm8731_write(codec, WM8731_PWR, reg | 0x0040);
 453                 break;
 454         case SNDRV_CTL_POWER_D3cold: /* Off, without power */
 455                 /* everything off, dac mute, inactive */
 456                 wm8731_write(codec, WM8731_ACTIVE, 0x0);
 457                 wm8731_write(codec, WM8731_PWR, 0xffff);
 458                 break;
 459         }
 460         codec->dapm_state = event;
 461         return 0;
 462 }
 463
 464 #define WM8731_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 465                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
 466                 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
 467                 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
 468                 SNDRV_PCM_RATE_96000)
 469
 470 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 471         SNDRV_PCM_FMTBIT_S24_LE)
 472
 473 struct snd_soc_codec_dai wm8731_dai = {
 474         .name = "WM8731",
 475         .playback = {
 476                 .stream_name = "Playback",
 477                 .channels_min = 1,
 478                 .channels_max = 2,
 479                 .rates = WM8731_RATES,
 480                 .formats = WM8731_FORMATS,},
 481         .capture = {
 482                 .stream_name = "Capture",
 483                 .channels_min = 1,
 484                 .channels_max = 2,
 485                 .rates = WM8731_RATES,
 486                 .formats = WM8731_FORMATS,},
 487         .ops = {
 488                 .prepare = wm8731_pcm_prepare,
 489                 .hw_params = wm8731_hw_params,
 490                 .shutdown = wm8731_shutdown,
 491         },
 492         .dai_ops = {
 493                 .digital_mute = wm8731_mute,
 494                 .set_sysclk = wm8731_set_dai_sysclk,
 495                 .set_fmt = wm8731_set_dai_fmt,
 496         }
 497 };
 498 EXPORT_SYMBOL_GPL(wm8731_dai);
 499
 500 static int wm8731_suspend(struct platform_device *pdev, pm_message_t state)
 501 {
 502         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 503         struct snd_soc_codec *codec = socdev->codec;
 504
 505         wm8731_write(codec, WM8731_ACTIVE, 0x0);
 506         wm8731_dapm_event(codec, SNDRV_CTL_POWER_D3cold);
 507         return 0;
 508 }
 509
 510 static int wm8731_resume(struct platform_device *pdev)
 511 {
 512         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 513         struct snd_soc_codec *codec = socdev->codec;
 514         int i;
 515         u8 data[2];
 516         u16 *cache = codec->reg_cache;
 517
 518         /* Sync reg_cache with the hardware */
 519         for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) {
 520                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 521                 data[1] = cache[i] & 0x00ff;
 522                 codec->hw_write(codec->control_data, data, 2);
 523         }
 524         wm8731_dapm_event(codec, SNDRV_CTL_POWER_D3hot);
 525         wm8731_dapm_event(codec, codec->suspend_dapm_state);
 526         return 0;
 527 }
 528
 529 /*
 530  * initialise the WM8731 driver
 531  * register the mixer and dsp interfaces with the kernel
 532  */
 533 static int wm8731_init(struct snd_soc_device *socdev)
 534 {
 535         struct snd_soc_codec *codec = socdev->codec;
 536         int reg, ret = 0;
 537
 538         codec->name = "WM8731";
 539         codec->owner = THIS_MODULE;
 540         codec->read = wm8731_read_reg_cache;
 541         codec->write = wm8731_write;
 542         codec->dapm_event = wm8731_dapm_event;
 543         codec->dai = &wm8731_dai;
 544         codec->num_dai = 1;
 545         codec->reg_cache_size = sizeof(wm8731_reg);
 546         codec->reg_cache = kmemdup(wm8731_reg, sizeof(wm8731_reg), GFP_KERNEL);
 547         if (codec->reg_cache == NULL)
 548                 return -ENOMEM;
 549
 550         wm8731_reset(codec);
 551
 552         /* register pcms */
 553         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 554         if (ret < 0) {
 555                 printk(KERN_ERR "wm8731: failed to create pcms\n");
 556                 goto pcm_err;
 557         }
 558
 559         /* power on device */
 560         wm8731_dapm_event(codec, SNDRV_CTL_POWER_D3hot);
 561
 562         /* set the update bits */
 563         reg = wm8731_read_reg_cache(codec, WM8731_LOUT1V);
 564         wm8731_write(codec, WM8731_LOUT1V, reg & ~0x0100);
 565         reg = wm8731_read_reg_cache(codec, WM8731_ROUT1V);
 566         wm8731_write(codec, WM8731_ROUT1V, reg & ~0x0100);
 567         reg = wm8731_read_reg_cache(codec, WM8731_LINVOL);
 568         wm8731_write(codec, WM8731_LINVOL, reg & ~0x0100);
 569         reg = wm8731_read_reg_cache(codec, WM8731_RINVOL);
 570         wm8731_write(codec, WM8731_RINVOL, reg & ~0x0100);
 571
 572         wm8731_add_controls(codec);
 573         wm8731_add_widgets(codec);
 574         ret = snd_soc_register_card(socdev);
 575         if (ret < 0) {
 576                 printk(KERN_ERR "wm8731: failed to register card\n");
 577                 goto card_err;
 578         }
 579
 580         return ret;
 581
 582 card_err:
 583         snd_soc_free_pcms(socdev);
 584         snd_soc_dapm_free(socdev);
 585 pcm_err:
 586         kfree(codec->reg_cache);
 587         return ret;
 588 }
 589
 590 static struct snd_soc_device *wm8731_socdev;
 591
 592 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 593
 594 /*
 595  * WM8731 2 wire address is determined by GPIO5
 596  * state during powerup.
 597  *    low  = 0x1a
 598  *    high = 0x1b
 599  */
 600 static unsigned short normal_i2c[] = { 0, I2C_CLIENT_END };
 601
 602 /* Magic definition of all other variables and things */
 603 I2C_CLIENT_INSMOD;
 604
 605 static struct i2c_driver wm8731_i2c_driver;
 606 static struct i2c_client client_template;
 607
 608 /* If the i2c layer weren't so broken, we could pass this kind of data
 609    around */
 610
 611 static int wm8731_codec_probe(struct i2c_adapter *adap, int addr, int kind)
 612 {
 613         struct snd_soc_device *socdev = wm8731_socdev;
 614         struct wm8731_setup_data *setup = socdev->codec_data;
 615         struct snd_soc_codec *codec = socdev->codec;
 616         struct i2c_client *i2c;
 617         int ret;
 618
 619         if (addr != setup->i2c_address)
 620                 return -ENODEV;
 621
 622         client_template.adapter = adap;
 623         client_template.addr = addr;
 624
 625         i2c = kmemdup(&client_template, sizeof(client_template), GFP_KERNEL);
 626         if (i2c == NULL) {
 627                 kfree(codec);
 628                 return -ENOMEM;
 629         }
 630         i2c_set_clientdata(i2c, codec);
 631         codec->control_data = i2c;
 632
 633         ret = i2c_attach_client(i2c);
 634         if (ret < 0) {
 635                 err("failed to attach codec at addr %x\n", addr);
 636                 goto err;
 637         }
 638
 639         ret = wm8731_init(socdev);
 640         if (ret < 0) {
 641                 err("failed to initialise WM8731\n");
 642                 goto err;
 643         }
 644         return ret;
 645
 646 err:
 647         kfree(codec);
 648         kfree(i2c);
 649         return ret;
 650 }
 651
 652 static int wm8731_i2c_detach(struct i2c_client *client)
 653 {
 654         struct snd_soc_codec *codec = i2c_get_clientdata(client);
 655         i2c_detach_client(client);
 656         kfree(codec->reg_cache);
 657         kfree(client);
 658         return 0;
 659 }
 660
 661 static int wm8731_i2c_attach(struct i2c_adapter *adap)
 662 {
 663         return i2c_probe(adap, &addr_data, wm8731_codec_probe);
 664 }
 665
 666 /* corgi i2c codec control layer */
 667 static struct i2c_driver wm8731_i2c_driver = {
 668         .driver = {
 669                 .name = "WM8731 I2C Codec",
 670                 .owner = THIS_MODULE,
 671         },
 672         .id =             I2C_DRIVERID_WM8731,
 673         .attach_adapter = wm8731_i2c_attach,
 674         .detach_client =  wm8731_i2c_detach,
 675         .command =        NULL,
 676 };
 677
 678 static struct i2c_client client_template = {
 679         .name =   "WM8731",
 680         .driver = &wm8731_i2c_driver,
 681 };
 682 #endif
 683
 684 static int wm8731_probe(struct platform_device *pdev)
 685 {
 686         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 687         struct wm8731_setup_data *setup;
 688         struct snd_soc_codec *codec;
 689         struct wm8731_priv *wm8731;
 690         int ret = 0;
 691
 692         info("WM8731 Audio Codec %s", WM8731_VERSION);
 693
 694         setup = socdev->codec_data;
 695         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
 696         if (codec == NULL)
 697                 return -ENOMEM;
 698
 699         wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL);
 700         if (wm8731 == NULL) {
 701                 kfree(codec);
 702                 return -ENOMEM;
 703         }
 704
 705         codec->private_data = wm8731;
 706         socdev->codec = codec;
 707         mutex_init(&codec->mutex);
 708         INIT_LIST_HEAD(&codec->dapm_widgets);
 709         INIT_LIST_HEAD(&codec->dapm_paths);
 710
 711         wm8731_socdev = socdev;
 712 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 713         if (setup->i2c_address) {
 714                 normal_i2c[0] = setup->i2c_address;
 715                 codec->hw_write = (hw_write_t)i2c_master_send;
 716                 ret = i2c_add_driver(&wm8731_i2c_driver);
 717                 if (ret != 0)
 718                         printk(KERN_ERR "can't add i2c driver");
 719         }
 720 #else
 721         /* Add other interfaces here */
 722 #endif
 723         return ret;
 724 }
 725
 726 /* power down chip */
 727 static int wm8731_remove(struct platform_device *pdev)
 728 {
 729         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 730         struct snd_soc_codec *codec = socdev->codec;
 731
 732         if (codec->control_data)
 733                 wm8731_dapm_event(codec, SNDRV_CTL_POWER_D3cold);
 734
 735         snd_soc_free_pcms(socdev);
 736         snd_soc_dapm_free(socdev);
 737 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 738         i2c_del_driver(&wm8731_i2c_driver);
 739 #endif
 740         kfree(codec->private_data);
 741         kfree(codec);
 742
 743         return 0;
 744 }
 745
 746 struct snd_soc_codec_device soc_codec_dev_wm8731 = {
 747         .probe =        wm8731_probe,
 748         .remove =       wm8731_remove,
 749         .suspend =      wm8731_suspend,
 750         .resume =       wm8731_resume,
 751 };
 752 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8731);
 753
 754 MODULE_DESCRIPTION("ASoC WM8731 driver");
 755 MODULE_AUTHOR("Richard Purdie");
 756 MODULE_LICENSE("GPL");